Meroterpenoids from the fruits of Psoralea corylifolia
TETRAHEDRON
Authors: Xu, Qing-Xia; Xu, Wei; Yang, Xiu-Wei
Abstract
Fourteen new meroterpenoid compounds, corypsoriols A-N (1-14), and eight known ones (15-22), were isolated from the fruits of Psoralea corylifolia. The absolute configurations of these new compounds were confirmed by NOESY spectrum, ECD calculation, and single crystal X-ray diffraction. Corypsoriols A and B were a novel skeleton which possessed a 6/5/6 tricyclic system, and their plausible biosynthetic pathway was proposed. The cytotoxicity of uncyclized meroterpenoids were stronger than those of cyclized ones, and the half maximal inhibitory concentration values of bakuchiol (15) against NCI-N87, HepG2, HCT-116, Hela and B16-F10 cell lines were in the range of 5-20 mu M. (C) 2020 Elsevier Ltd. All rights reserved.
Using CT texture analysis to differentiate between peripheral lung cancer and pulmonary inflammatory pseudotumor
BMC MEDICAL IMAGING
Authors: Liu, Chenlu; Ma, Changsheng; Duan, Jinghao; Qiu, Qingtao; Guo, Yanluan; Zhang, Zhenhua; Yin, Yong
Abstract
Background This study is to distinguish peripheral lung cancer and pulmonary inflammatory pseudotumor using CT-radiomics features extracted from PET/CT images. Methods In this study, the standard 18F-fluorodeoxyglucose positron emission tomography/ computed tomography (18 F-FDG PET/CT) images of 21 patients with pulmonary inflammatory pseudotumor (PIPT) and 21 patients with peripheral lung cancer were retrospectively collected. The dataset was used to extract CT-radiomics features from regions of interest (ROI), The intra-class correlation coefficient (ICC) was used to screen the robust feature from all the radiomic features. Using, then, statistical methods to screen CT-radiomics features, which could distinguish peripheral lung cancer and PIPT. And the ability of radiomics features distinguished peripheral lung cancer and PIPT was estimated by receiver operating characteristic (ROC) curve and compared by the Delong test. Results A total of 435 radiomics features were extracted, of which 361 features showed relatively good repeatability (ICC >= 0.6). 20 features showed the ability to distinguish peripheral lung cancer from PIPT. these features were seen in 14 of 330 Gray-Level Co-occurrence Matrix features, 1 of 49 Intensity Histogram features, 5 of 18 Shape features. The area under the curves (AUC) of these features were 0.731 +/- 0.075, 0.717, 0.748 +/- 0.038, respectively. ThePvalues of statistical differences among ROC were 0.0499 (F9, F20), 0.0472 (F10, F11) and 0.0145 (F11, Mean4). The discrimination ability of forming new features (Parent Features) after averaging the features extracted at different angles and distances was moderate compared to the previous features (Child features). Conclusion Radiomics features extracted from non-contrast CT based on PET/CT images can help distinguish peripheral lung cancer and PIPT.